Amplifying horn



1927- '1,6sz,43's@@ F. CIRELL! AMPLIFYING HORN Filed May 18. 1926 4 3 Sheets-Sheet 1-.

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INVENTOR:

. Aug 251927.-

F. CIRELL'I AMPLIFYING HORN Filed May 18. 1926 FIG: J

3 Sheets-Sheet 2 y L! L] WITNESSES:

INVENTOR: 3 MC? k razzcesco 6716i,

BY r I 1 I II.

Aug. 2,1921. 37,438

F. CIRELLI AMPLIFYING HORN Filed May 1926 3 Sheets-Sheet INVENTOR: fialwasca 62112510,

BY I y" A ATTORNEY Patented Aug. 2, 1927.

FRANGESCQ GIRELLZ, F PHILABEllLPHlA, PENNl-EYLVANIA.

.aiurmrvmenears.

Application filed May 18 1928. serial No. 109,843.

This invention relates to amplifying horns and its object is to provide a horn which will amplify music or speech with good vol ume and with the full original clearness and purity of tone.

7 This object; and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which Figure 1 is a side elevation of a horn embodying my invention showing it as used with graphophones,

' Figure 2 a sectional view taken on line 22 of Figure 1,

Figure 3 a sectional view taken on line 3-3 of Figure l, I

Figure 4 a sectional view taken on line 4- of Figure it,

Figure 5 a side elevation of a modified form illustrating how it may be attached to a cabinet, and

Figures 6 7 and 8 side elevations of dillerent shapes according to which my horn may be made.

' The results produced by my horn are due to the proportioning of its diameters to its length. The horn may be bent into any desiredshape and will; function satisfactorily end 2 is substantially 15 1/4 times thediif the proportions are retained. I have therefore shown a few general forms according to which the horn may be shaped, but it is to be understood that the shape into which the horn is bent may be varied with.-

out departing from the spirit of, thisinven tion.

Referring to the drawings and more particularly to Figure 6, 1 indicates the large or open end of the horn and 2' the small end -which is adapted to be connected with a sound reproducer. The horn has a part 3 which has a non-uniform taper from the open end 1 to a point 4. The distance to thls point is substantially equal to 5 1/3 times the diameter at the point. The radius a of the horn at point 4 is equal to 1/9th of the diameter of the open endl. From the point l the horn has a part 5 which tapers uniformly down to the end- 2 which is substantially 1/6th of the diameter at the point- 4. The distance from point 4 to the ameter at the point 4; A 'horn made according to these proportions will give good results when bent into any shape. I have found that best results may be obtained Wll.i

a part of the born from endAZ is bent into horizontal convolutions 6 as shown in Figures 1, 2 and 4.

In Figure 1 the part 3 is bent substan tially at right angles to the straight portion 7 of part 5 beginning at point 4;. The lower end of straight portion 7 is fixed to a bracket 8 secured to any suitable support 9. The convoluted part 6 is mounted in. bracket 8 for horizontal swinging movement as shown in Figure .2. This mountingconsists of a pin 10 fined to the convoluted'part 6 1 and bearing in the lower and upper parts 11 and 12 of the bracket.

The convoluted part 6 is made in two sections. The outer section 13 is connected for vertical swinging movement to the inner section 14. The connection may be as shown in Figure 3, which consists of a nut 15 threaded to the meeting end of section 14' and having an inwardly extending flange 16 which engages and holds the outwardly extending flange 17 of the meeting end of section 13. r A sound reproducer 18 is attached to end 2 of the horn. As the sound reproduce]? is moved horizontall the convo uted part 6 of the hornwil swing in bracket 8 from the dot-and-dash line position to the full line position indicated in Figure 2. After playing, the sound reproducer may be swung out of the way to the dot-and-dash line position shown in Figure 1.

In Figure 5 I have saown a horn adapted to depend into a. cabinet instead. of extending above the cabinet as shown in Figure 1. In all other respects this horn is similar to the one shown in Figure 1 except that bracket 8 has a 'foot 8*.which is adapted to be secured to the cabinet. I have therefore given corresponding parts similar reference characters with the exponent a.

In Figure 7 I have shown the lower end of the horn as being bent upwardly to form a vertical convolution and in'Figure 8 the horn is bent to have a plurality or? vertical convolutions and I have therefore given corresponding parts similar reference characters with the exponents -b in Figure '7' and c in Figure 8.

. type, the sound waves, as they pass through the part 5, are gradually clarified, and somewhat amplified, and as they pass through the part 3 they are amplified so that they i saw I leave the horn with good volume andwith a of said part being substantially equal to onethe full original clearness and purity of tone as produced by the sound reproducer.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A horn having a part of non-uniform taper joined to a part of uniform taper, the radius of the horn at the point of juncture bein substantially equal to one-ninth of the ingest diameter of the first mentioned part, the length of said part being substantially equal to five and one-third times the diameter at the juncture point, the length of the uniformly tapering part being substantially equal to fi teen and onefourth' times the diameter at the juncture point and the free end of said last mentioned art being substantially equal to one-sixth 0 the diameter at the juncture point.

2. A horn having a part of non-uniform taper joined to a part of uniform taper, the

radius of the horn at the point of juncture being substantially equal to one-ninth of the largest diameter of the first mentioned art, the length of said part being substantlally equal to five and one-third times the diameter at the juncture point, the length of the uniformly tapering art being substantially equal to fifteen and one-fourth times the diameter at the juncture point, the free end sixth o the diameter at the uncture int, the first mentioned part being curve to a right angle to the second mentioned art, the curving beginning at the point of mmture, and the second mentioned part having a series of convolutions.

3. A horn having a part of non-unif0rm taper joined to a part of uniform taper, the radius of the horn at the point of juncture being substantially equal to one-ninth of the largest diameter of the first mentioned art, the length of said part being substantially equal to five and one-third times the diameter at the juncture point, the length of the uniformly tapering part being substantially equal to fifteen and one-fourth times the diameter at the juncture point, the free end of said part being substantially equal to onesixth of the diameter at the juncture point,

the first mentioned part being curved to a right angle to the second mentioned part, the curving beginning at the point of uncture, and the second mentioned pait having a series of convolutions disposed at right angles to the axis of the uniformly tapering part.

4. A horn substantially in accordance with claim 1, including a part of non-uniform taper merging into a part of uniform taper composed of a plurality of sections, two of the sections of the last mentioned part being convoluted horizontally and one section being disposed vertically; means swingably connecting one convoluted section to the other for vertical movement, and means connecting the other convoluted section to the vertically disposed section for horizontal movement.

5. A horn substantially in accordance with claim 1, including a curved part of non -uniform taper merging into a vertical part of uniform taper; a horizontally convoluted tone arm swin ably connected with the var tical part of horizontal movement, and a goose-neck swingably connected to the tone arm for vertical movement.

6. A horn substantially in accordance with claim 1, including a curved part of non-uniform taper-merging into a vertical part of uniform taper; a horizontally convoluted tone arm swingably connected with the vertical part for horizontal movement, and a gooseneck swingably connected to the tone arm for vertical movement. the tone arm and goose-neck being of a uniform taper.

in testimony whereof I have signed my name to this specification.

FRANCESCO CIRELLI. 

